I have added a 24 v power supply, power going to TB2 at pin 1 (pos field power) and pin 8 ground.

The CR3 light, does light now!!, I have swapped encoder 0 & 1 "went to" encoder 2 & 3 located at TB3 & TB4; in addition to the associated DRV 0 & 1 "went to" DRV 2 & 3, with the hope, if there was something possibly just goofed up at the original settings. In addition the red CR16 (Field I/O fault) and CR15 does not blink, or come on at all.

andypugh wrote: Not a problem, but are you actually using the parallel port?

I am still wondering why we are not seeing any active sserial pins showing in the dmesg. But I have never used a 7i77, so don't know what you would expect to see.

I have installed 2 of them (7i77) and i was wondering the same thing. Conned through all that dmesg but could not find anything wrong. The pinout in the Linuxcnc error report was a bit off.
But knowing PCW is always here, i refrain myself from commecting on things i do not have at least a certain degree of certenty, so i just read and learn.

Now we're coockin !!!
Now you are on the right track, as it is communicating with 7i77 and finding the analog outs. It just looks like you do not have any encoder connected to encoder port 4. You can just ommit that line and move on, until you connect the encoder to that line.
Try that and report back.

PCW Many thanks! The linux is on a computer that is not connected to the internet, so a memory stick is the way it works. I have used the copy and past to get a file (in a text editor) saved on the linux machine usb stick and go to win 10 machine for internet. Now at this point I can attach if I add the .txt to the file name (as seen below) or it appears to be copy and paste, like what I was doing here. So maybe try attachment for change, please comment.

tommylight many thanks to you as well for your thought and encouragement!

If I do not have 110 v power on the error code will be 56.
IF power up the 121 code is displayed as the files show.